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1/* ld script to make s390 Linux kernel
2 * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
3 */
4
5#include <asm/thread_info.h>
6#include <asm/page.h>
7#include <asm-generic/vmlinux.lds.h>
8
9#ifndef CONFIG_64BIT
10OUTPUT_FORMAT("elf32-s390", "elf32-s390", "elf32-s390")
11OUTPUT_ARCH(s390)
12ENTRY(_start)
13jiffies = jiffies_64 + 4;
14#else
15OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
16OUTPUT_ARCH(s390:64-bit)
17ENTRY(_start)
18jiffies = jiffies_64;
19#endif
20
21PHDRS {
22 text PT_LOAD FLAGS(5); /* R_E */
23 data PT_LOAD FLAGS(7); /* RWE */
24 note PT_NOTE FLAGS(0); /* ___ */
25}
26
27SECTIONS
28{
29 . = 0x00000000;
30 .text : {
31 _text = .; /* Text and read-only data */
32 HEAD_TEXT
33 TEXT_TEXT
34 SCHED_TEXT
35 LOCK_TEXT
36 KPROBES_TEXT
37 IRQENTRY_TEXT
38 *(.fixup)
39 *(.gnu.warning)
40 } :text = 0x0700
41
42 _etext = .; /* End of text section */
43
44 NOTES :text :note
45
46 RODATA
47
48#ifdef CONFIG_SHARED_KERNEL
49 . = ALIGN(0x100000); /* VM shared segments are 1MB aligned */
50#endif
51
52 . = ALIGN(PAGE_SIZE);
53 _eshared = .; /* End of shareable data */
54 _sdata = .; /* Start of data section */
55
56 EXCEPTION_TABLE(16) :data
57
58 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
59
60 _edata = .; /* End of data section */
61
62 /* will be freed after init */
63 . = ALIGN(PAGE_SIZE); /* Init code and data */
64 __init_begin = .;
65
66 INIT_TEXT_SECTION(PAGE_SIZE)
67
68 /*
69 * .exit.text is discarded at runtime, not link time,
70 * to deal with references from __bug_table
71 */
72 .exit.text : {
73 EXIT_TEXT
74 }
75
76 /* early.c uses stsi, which requires page aligned data. */
77 . = ALIGN(PAGE_SIZE);
78 INIT_DATA_SECTION(0x100)
79
80 PERCPU_SECTION(0x100)
81 . = ALIGN(PAGE_SIZE);
82 __init_end = .; /* freed after init ends here */
83
84 BSS_SECTION(0, 2, 0)
85
86 _end = . ;
87
88 /* Debugging sections. */
89 STABS_DEBUG
90 DWARF_DEBUG
91
92 /* Sections to be discarded */
93 DISCARDS
94}
1/* SPDX-License-Identifier: GPL-2.0 */
2/* ld script to make s390 Linux kernel
3 * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
4 */
5
6#include <asm/thread_info.h>
7#include <asm/page.h>
8
9/*
10 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
11 * make sure it has 16k alignment.
12 */
13#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
14
15/* Handle ro_after_init data on our own. */
16#define RO_AFTER_INIT_DATA
17
18#include <asm-generic/vmlinux.lds.h>
19
20OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
21OUTPUT_ARCH(s390:64-bit)
22ENTRY(startup)
23jiffies = jiffies_64;
24
25PHDRS {
26 text PT_LOAD FLAGS(5); /* R_E */
27 data PT_LOAD FLAGS(7); /* RWE */
28 note PT_NOTE FLAGS(0); /* ___ */
29}
30
31SECTIONS
32{
33 . = 0x00000000;
34 .text : {
35 /* Text and read-only data */
36 HEAD_TEXT
37 /*
38 * E.g. perf doesn't like symbols starting at address zero,
39 * therefore skip the initial PSW and channel program located
40 * at address zero and let _text start at 0x200.
41 */
42 _text = 0x200;
43 TEXT_TEXT
44 SCHED_TEXT
45 CPUIDLE_TEXT
46 LOCK_TEXT
47 KPROBES_TEXT
48 IRQENTRY_TEXT
49 SOFTIRQENTRY_TEXT
50 *(.fixup)
51 *(.gnu.warning)
52 } :text = 0x0700
53
54 . = ALIGN(PAGE_SIZE);
55 _etext = .; /* End of text section */
56
57 NOTES :text :note
58
59 .dummy : { *(.dummy) } :data
60
61 RO_DATA_SECTION(PAGE_SIZE)
62
63 . = ALIGN(PAGE_SIZE);
64 _sdata = .; /* Start of data section */
65
66 . = ALIGN(PAGE_SIZE);
67 __start_ro_after_init = .;
68 .data..ro_after_init : {
69 *(.data..ro_after_init)
70 }
71 EXCEPTION_TABLE(16)
72 . = ALIGN(PAGE_SIZE);
73 __end_ro_after_init = .;
74
75 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
76
77 _edata = .; /* End of data section */
78
79 /* will be freed after init */
80 . = ALIGN(PAGE_SIZE); /* Init code and data */
81 __init_begin = .;
82
83 . = ALIGN(PAGE_SIZE);
84 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
85 VMLINUX_SYMBOL(_sinittext) = . ;
86 INIT_TEXT
87 . = ALIGN(PAGE_SIZE);
88 VMLINUX_SYMBOL(_einittext) = . ;
89 }
90
91 /*
92 * .exit.text is discarded at runtime, not link time,
93 * to deal with references from __bug_table
94 */
95 .exit.text : {
96 EXIT_TEXT
97 }
98
99 .exit.data : {
100 EXIT_DATA
101 }
102
103 /*
104 * struct alt_inst entries. From the header (alternative.h):
105 * "Alternative instructions for different CPU types or capabilities"
106 * Think locking instructions on spinlocks.
107 * Note, that it is a part of __init region.
108 */
109 . = ALIGN(8);
110 .altinstructions : {
111 __alt_instructions = .;
112 *(.altinstructions)
113 __alt_instructions_end = .;
114 }
115
116 /*
117 * And here are the replacement instructions. The linker sticks
118 * them as binary blobs. The .altinstructions has enough data to
119 * get the address and the length of them to patch the kernel safely.
120 * Note, that it is a part of __init region.
121 */
122 .altinstr_replacement : {
123 *(.altinstr_replacement)
124 }
125
126 /*
127 * Table with the patch locations to undo expolines
128 */
129 .nospec_call_table : {
130 __nospec_call_start = . ;
131 *(.s390_indirect*)
132 __nospec_call_end = . ;
133 }
134 .nospec_return_table : {
135 __nospec_return_start = . ;
136 *(.s390_return*)
137 __nospec_return_end = . ;
138 }
139
140 /* early.c uses stsi, which requires page aligned data. */
141 . = ALIGN(PAGE_SIZE);
142 INIT_DATA_SECTION(0x100)
143
144 PERCPU_SECTION(0x100)
145 . = ALIGN(PAGE_SIZE);
146 __init_end = .; /* freed after init ends here */
147
148 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
149
150 _end = . ;
151
152 /* Debugging sections. */
153 STABS_DEBUG
154 DWARF_DEBUG
155
156 /* Sections to be discarded */
157 DISCARDS
158 /DISCARD/ : {
159 *(.eh_frame)
160 }
161}